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The glassstones do yield a brighter finish if they are not loaded up with metal swarf so lots of water helps. Unlike other stones that use the mud generated from the stone to advantage, the Shaptons - pro and glass - primarily contain metal swarf which yields a duller finish left on the stone. Also the smallest amount of your quarter micron spray on the stones will remove or eliminate metal swarf buildup or glazing. It won't replace your final finish with just the quarter micron spray on nanocloth. ZDP-189 has lots of Chromium carbides (20%) and with a pinch of CBN it will increase the speed of your Shapton stones considerably, giving you a denser stone slurry and a more aggressive cutting action and improved finish. ZDP-189 will take an exceptional edge so you can even continue to increase the sharpness of your edge past quarter micron.

In addition to keeping the metal swarf content down, spend a bit more time on each stone to more completely remove the scratch pattern from the previous stone. At times you will get an excellent edge but still need to go a bit further to get all the scratches out. They show up later and require going back to lower grits to remove them.

If you are trying to figure out which stones are leaving the scratches, try 'stroking' the knife in alternative directions with each stone so you can determine what stone scratches they are by scratch direction.

ken123 wrote:The glassstones do yield a brighter finish if they are not loaded up with metal swarf so lots of water helps. Unlike other stones that use the mud generated from the stone to advantage, the Shaptons - pro and glass - primarily contain metal swarf which yields a duller finish left on the stone. Also the smallest amount of your quarter micron spray on the stones will remove or eliminate metal swarf buildup or glazing. It won't replace your final finish with just the quarter micron spray on nanocloth. ZDP-189 has lots of Chromium carbides (20%) and with a pinch of CBN it will increase the speed of your Shapton stones considerably, giving you a denser stone slurry and a more aggressive cutting action and improved finish. ZDP-189 will take an exceptional edge so you can even continue to increase the sharpness of your edge past quarter micron.

In addition to keeping the metal swarf content down, spend a bit more time on each stone to more completely remove the scratch pattern from the previous stone. At times you will get an excellent edge but still need to go a bit further to get all the scratches out. They show up later and require going back to lower grits to remove them.

If you are trying to figure out which stones are leaving the scratches, try 'stroking' the knife in alternative directions with each stone so you can determine what stone scratches they are by scratch direction.

---Ken

Oh I always stroked in both directions to make a cross hatched pattern..... will do what you said instead

as far as the first part, just spray the diamond on the stones and and go?

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